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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2012 The Netty Project</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * The Netty Project licenses this file to you under the Apache License,</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * version 2.0 (the "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * with the License. You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.handler.codec.spdy;
<a class="jxr_linenumber" name="17" href="#17">17</a>  
<a class="jxr_linenumber" name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.ChannelBuffer;
<a class="jxr_linenumber" name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.ChannelBuffers;
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelDownstreamHandler;
<a class="jxr_linenumber" name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelEvent;
<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelHandlerContext;
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelStateEvent;
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.Channels;
<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.MessageEvent;
<a class="jxr_linenumber" name="26" href="#26">26</a>  
<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> java.nio.ByteOrder;
<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> java.util.Set;
<a class="jxr_linenumber" name="29" href="#29">29</a>  
<a class="jxr_linenumber" name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> <strong class="jxr_keyword">static</strong> org.jboss.netty.handler.codec.spdy.SpdyCodecUtil.*;
<a class="jxr_linenumber" name="31" href="#31">31</a>  
<a class="jxr_linenumber" name="32" href="#32">32</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="33" href="#33">33</a>  <em class="jxr_javadoccomment"> * Encodes a SPDY Data or Control Frame into a {@link ChannelBuffer}.</em>
<a class="jxr_linenumber" name="34" href="#34">34</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="35" href="#35">35</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyFrameEncoder.html">SpdyFrameEncoder</a> <strong class="jxr_keyword">implements</strong> <a href="../../../../../../org/jboss/netty/channel/ChannelDownstreamHandler.html">ChannelDownstreamHandler</a> {
<a class="jxr_linenumber" name="36" href="#36">36</a>  
<a class="jxr_linenumber" name="37" href="#37">37</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> version;
<a class="jxr_linenumber" name="38" href="#38">38</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">boolean</strong> finished;
<a class="jxr_linenumber" name="39" href="#39">39</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyHeaderBlockCompressor.html">SpdyHeaderBlockCompressor</a> headerBlockCompressor;
<a class="jxr_linenumber" name="40" href="#40">40</a>  
<a class="jxr_linenumber" name="41" href="#41">41</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_javadoccomment">     * Creates a new instance with the default {@code version (2)},</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_javadoccomment">     * {@code compressionLevel (6)}, {@code windowBits (15)},</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <em class="jxr_javadoccomment">     * and {@code memLevel (8)}.</em>
<a class="jxr_linenumber" name="45" href="#45">45</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="46" href="#46">46</a>      @Deprecated
<a class="jxr_linenumber" name="47" href="#47">47</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyFrameEncoder.html">SpdyFrameEncoder</a>() {
<a class="jxr_linenumber" name="48" href="#48">48</a>          <strong class="jxr_keyword">this</strong>(2, 6, 15, 8);
<a class="jxr_linenumber" name="49" href="#49">49</a>      }
<a class="jxr_linenumber" name="50" href="#50">50</a>  
<a class="jxr_linenumber" name="51" href="#51">51</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="52" href="#52">52</a>  <em class="jxr_javadoccomment">     * Creates a new instance with the specified {@code version} and the</em>
<a class="jxr_linenumber" name="53" href="#53">53</a>  <em class="jxr_javadoccomment">     * default {@code compressionLevel (6)}, {@code windowBits (15)},</em>
<a class="jxr_linenumber" name="54" href="#54">54</a>  <em class="jxr_javadoccomment">     * and {@code memLevel (8)}.</em>
<a class="jxr_linenumber" name="55" href="#55">55</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="56" href="#56">56</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyFrameEncoder.html">SpdyFrameEncoder</a>(<strong class="jxr_keyword">int</strong> version) {
<a class="jxr_linenumber" name="57" href="#57">57</a>          <strong class="jxr_keyword">this</strong>(version, 6, 15, 8);
<a class="jxr_linenumber" name="58" href="#58">58</a>      }
<a class="jxr_linenumber" name="59" href="#59">59</a>  
<a class="jxr_linenumber" name="60" href="#60">60</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="61" href="#61">61</a>  <em class="jxr_javadoccomment">     * Creates a new instance with the default {@code version (2)} and the</em>
<a class="jxr_linenumber" name="62" href="#62">62</a>  <em class="jxr_javadoccomment">     * specified parameters.</em>
<a class="jxr_linenumber" name="63" href="#63">63</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="64" href="#64">64</a>      @Deprecated
<a class="jxr_linenumber" name="65" href="#65">65</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyFrameEncoder.html">SpdyFrameEncoder</a>(<strong class="jxr_keyword">int</strong> compressionLevel, <strong class="jxr_keyword">int</strong> windowBits, <strong class="jxr_keyword">int</strong> memLevel) {
<a class="jxr_linenumber" name="66" href="#66">66</a>          <strong class="jxr_keyword">this</strong>(2, compressionLevel, windowBits, memLevel);
<a class="jxr_linenumber" name="67" href="#67">67</a>      }
<a class="jxr_linenumber" name="68" href="#68">68</a>  
<a class="jxr_linenumber" name="69" href="#69">69</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="70" href="#70">70</a>  <em class="jxr_javadoccomment">     * Creates a new instance with the specified parameters.</em>
<a class="jxr_linenumber" name="71" href="#71">71</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="72" href="#72">72</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyFrameEncoder.html">SpdyFrameEncoder</a>(<strong class="jxr_keyword">int</strong> version, <strong class="jxr_keyword">int</strong> compressionLevel, <strong class="jxr_keyword">int</strong> windowBits, <strong class="jxr_keyword">int</strong> memLevel) {
<a class="jxr_linenumber" name="73" href="#73">73</a>          <strong class="jxr_keyword">if</strong> (version &lt; SPDY_MIN_VERSION || version &gt; SPDY_MAX_VERSION) {
<a class="jxr_linenumber" name="74" href="#74">74</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a class="jxr_linenumber" name="75" href="#75">75</a>                      <span class="jxr_string">"unknown version: "</span> + version);
<a class="jxr_linenumber" name="76" href="#76">76</a>          }
<a class="jxr_linenumber" name="77" href="#77">77</a>          <strong class="jxr_keyword">this</strong>.version = version;
<a class="jxr_linenumber" name="78" href="#78">78</a>          headerBlockCompressor = SpdyHeaderBlockCompressor.newInstance(
<a class="jxr_linenumber" name="79" href="#79">79</a>                  version, compressionLevel, windowBits, memLevel);
<a class="jxr_linenumber" name="80" href="#80">80</a>      }
<a class="jxr_linenumber" name="81" href="#81">81</a>  
<a class="jxr_linenumber" name="82" href="#82">82</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleDownstream(
<a class="jxr_linenumber" name="83" href="#83">83</a>              <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/ChannelEvent.html">ChannelEvent</a> evt) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="84" href="#84">84</a>          <strong class="jxr_keyword">if</strong> (evt instanceof ChannelStateEvent) {
<a class="jxr_linenumber" name="85" href="#85">85</a>              <a href="../../../../../../org/jboss/netty/channel/ChannelStateEvent.html">ChannelStateEvent</a> e = (ChannelStateEvent) evt;
<a class="jxr_linenumber" name="86" href="#86">86</a>              <strong class="jxr_keyword">switch</strong> (e.getState()) {
<a class="jxr_linenumber" name="87" href="#87">87</a>              <strong class="jxr_keyword">case</strong> OPEN:
<a class="jxr_linenumber" name="88" href="#88">88</a>              <strong class="jxr_keyword">case</strong> CONNECTED:
<a class="jxr_linenumber" name="89" href="#89">89</a>              <strong class="jxr_keyword">case</strong> BOUND:
<a class="jxr_linenumber" name="90" href="#90">90</a>                  <strong class="jxr_keyword">if</strong> (Boolean.FALSE.equals(e.getValue()) || e.getValue() == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="91" href="#91">91</a>                      <strong class="jxr_keyword">synchronized</strong> (headerBlockCompressor) {
<a class="jxr_linenumber" name="92" href="#92">92</a>                          finished = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="93" href="#93">93</a>                          headerBlockCompressor.end();
<a class="jxr_linenumber" name="94" href="#94">94</a>                      }
<a class="jxr_linenumber" name="95" href="#95">95</a>                  }
<a class="jxr_linenumber" name="96" href="#96">96</a>              }
<a class="jxr_linenumber" name="97" href="#97">97</a>          }
<a class="jxr_linenumber" name="98" href="#98">98</a>  
<a class="jxr_linenumber" name="99" href="#99">99</a>          <strong class="jxr_keyword">if</strong> (!(evt instanceof MessageEvent)) {
<a class="jxr_linenumber" name="100" href="#100">100</a>             ctx.sendDownstream(evt);
<a class="jxr_linenumber" name="101" href="#101">101</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="102" href="#102">102</a>         }
<a class="jxr_linenumber" name="103" href="#103">103</a> 
<a class="jxr_linenumber" name="104" href="#104">104</a>         <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/channel/MessageEvent.html">MessageEvent</a> e = (MessageEvent) evt;
<a class="jxr_linenumber" name="105" href="#105">105</a>         Object msg = e.getMessage();
<a class="jxr_linenumber" name="106" href="#106">106</a> 
<a class="jxr_linenumber" name="107" href="#107">107</a>         <strong class="jxr_keyword">if</strong> (msg instanceof SpdyDataFrame) {
<a class="jxr_linenumber" name="108" href="#108">108</a> 
<a class="jxr_linenumber" name="109" href="#109">109</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyDataFrame.html">SpdyDataFrame</a> spdyDataFrame = (SpdyDataFrame) msg;
<a class="jxr_linenumber" name="110" href="#110">110</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> data = spdyDataFrame.getData();
<a class="jxr_linenumber" name="111" href="#111">111</a>             byte flags = spdyDataFrame.isLast() ? SPDY_DATA_FLAG_FIN : 0;
<a class="jxr_linenumber" name="112" href="#112">112</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> header = ChannelBuffers.buffer(
<a class="jxr_linenumber" name="113" href="#113">113</a>                     ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE);
<a class="jxr_linenumber" name="114" href="#114">114</a>             header.writeInt(spdyDataFrame.getStreamId() &amp; 0x7FFFFFFF);
<a class="jxr_linenumber" name="115" href="#115">115</a>             header.writeByte(flags);
<a class="jxr_linenumber" name="116" href="#116">116</a>             header.writeMedium(data.readableBytes());
<a class="jxr_linenumber" name="117" href="#117">117</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.wrappedBuffer(header, data);
<a class="jxr_linenumber" name="118" href="#118">118</a>             Channels.write(ctx, e.getFuture(), frame, e.getRemoteAddress());
<a class="jxr_linenumber" name="119" href="#119">119</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="120" href="#120">120</a>         }
<a class="jxr_linenumber" name="121" href="#121">121</a> 
<a class="jxr_linenumber" name="122" href="#122">122</a>         <strong class="jxr_keyword">if</strong> (msg instanceof SpdySynStreamFrame) {
<a class="jxr_linenumber" name="123" href="#123">123</a> 
<a class="jxr_linenumber" name="124" href="#124">124</a>             <strong class="jxr_keyword">synchronized</strong> (headerBlockCompressor) {
<a class="jxr_linenumber" name="125" href="#125">125</a>                 <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySynStreamFrame.html">SpdySynStreamFrame</a> spdySynStreamFrame = (SpdySynStreamFrame) msg;
<a class="jxr_linenumber" name="126" href="#126">126</a>                 <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> data = compressHeaderBlock(
<a class="jxr_linenumber" name="127" href="#127">127</a>                         encodeHeaderBlock(version, spdySynStreamFrame));
<a class="jxr_linenumber" name="128" href="#128">128</a>                 byte flags = spdySynStreamFrame.isLast() ? SPDY_FLAG_FIN : 0;
<a class="jxr_linenumber" name="129" href="#129">129</a>                 <strong class="jxr_keyword">if</strong> (spdySynStreamFrame.isUnidirectional()) {
<a class="jxr_linenumber" name="130" href="#130">130</a>                     flags |= SPDY_FLAG_UNIDIRECTIONAL;
<a class="jxr_linenumber" name="131" href="#131">131</a>                 }
<a class="jxr_linenumber" name="132" href="#132">132</a>                 <strong class="jxr_keyword">int</strong> headerBlockLength = data.readableBytes();
<a class="jxr_linenumber" name="133" href="#133">133</a>                 <strong class="jxr_keyword">int</strong> length;
<a class="jxr_linenumber" name="134" href="#134">134</a>                 <strong class="jxr_keyword">if</strong> (version &lt; 3) {
<a class="jxr_linenumber" name="135" href="#135">135</a>                     length = headerBlockLength == 0 ? 12 : 10 + headerBlockLength;
<a class="jxr_linenumber" name="136" href="#136">136</a>                 } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="137" href="#137">137</a>                     length = 10 + headerBlockLength;
<a class="jxr_linenumber" name="138" href="#138">138</a>                 }
<a class="jxr_linenumber" name="139" href="#139">139</a>                 <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(
<a class="jxr_linenumber" name="140" href="#140">140</a>                         ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + 12);
<a class="jxr_linenumber" name="141" href="#141">141</a>                 frame.writeShort(version | 0x8000);
<a class="jxr_linenumber" name="142" href="#142">142</a>                 frame.writeShort(SPDY_SYN_STREAM_FRAME);
<a class="jxr_linenumber" name="143" href="#143">143</a>                 frame.writeByte(flags);
<a class="jxr_linenumber" name="144" href="#144">144</a>                 frame.writeMedium(length);
<a class="jxr_linenumber" name="145" href="#145">145</a>                 frame.writeInt(spdySynStreamFrame.getStreamId());
<a class="jxr_linenumber" name="146" href="#146">146</a>                 frame.writeInt(spdySynStreamFrame.getAssociatedToStreamId());
<a class="jxr_linenumber" name="147" href="#147">147</a>                 <strong class="jxr_keyword">if</strong> (version &lt; 3) {
<a class="jxr_linenumber" name="148" href="#148">148</a>                     <em class="jxr_comment">// Restrict priorities for SPDY/2 to between 0 and 3</em>
<a class="jxr_linenumber" name="149" href="#149">149</a>                     byte priority = spdySynStreamFrame.getPriority();
<a class="jxr_linenumber" name="150" href="#150">150</a>                     <strong class="jxr_keyword">if</strong> (priority &gt; 3) {
<a class="jxr_linenumber" name="151" href="#151">151</a>                         priority = 3;
<a class="jxr_linenumber" name="152" href="#152">152</a>                     }
<a class="jxr_linenumber" name="153" href="#153">153</a>                     frame.writeShort((priority &amp; 0xFF) &lt;&lt; 14);
<a class="jxr_linenumber" name="154" href="#154">154</a>                 } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="155" href="#155">155</a>                     frame.writeShort((spdySynStreamFrame.getPriority() &amp; 0xFF) &lt;&lt; 13);
<a class="jxr_linenumber" name="156" href="#156">156</a>                 }
<a class="jxr_linenumber" name="157" href="#157">157</a>                 <strong class="jxr_keyword">if</strong> (version &lt; 3 &amp;&amp; data.readableBytes() == 0) {
<a class="jxr_linenumber" name="158" href="#158">158</a>                     frame.writeShort(0);
<a class="jxr_linenumber" name="159" href="#159">159</a>                 }
<a class="jxr_linenumber" name="160" href="#160">160</a>                 <em class="jxr_comment">// Writes of compressed data must occur in order</em>
<a class="jxr_linenumber" name="161" href="#161">161</a>                 <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> buffer = ChannelBuffers.wrappedBuffer(frame, data);
<a class="jxr_linenumber" name="162" href="#162">162</a>                 Channels.write(ctx, e.getFuture(), buffer, e.getRemoteAddress());
<a class="jxr_linenumber" name="163" href="#163">163</a>             }
<a class="jxr_linenumber" name="164" href="#164">164</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="165" href="#165">165</a>         }
<a class="jxr_linenumber" name="166" href="#166">166</a> 
<a class="jxr_linenumber" name="167" href="#167">167</a>         <strong class="jxr_keyword">if</strong> (msg instanceof SpdySynReplyFrame) {
<a class="jxr_linenumber" name="168" href="#168">168</a> 
<a class="jxr_linenumber" name="169" href="#169">169</a>             <strong class="jxr_keyword">synchronized</strong> (headerBlockCompressor) {
<a class="jxr_linenumber" name="170" href="#170">170</a>                 <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySynReplyFrame.html">SpdySynReplyFrame</a> spdySynReplyFrame = (SpdySynReplyFrame) msg;
<a class="jxr_linenumber" name="171" href="#171">171</a>                 <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> data = compressHeaderBlock(
<a class="jxr_linenumber" name="172" href="#172">172</a>                         encodeHeaderBlock(version, spdySynReplyFrame));
<a class="jxr_linenumber" name="173" href="#173">173</a>                 byte flags = spdySynReplyFrame.isLast() ? SPDY_FLAG_FIN : 0;
<a class="jxr_linenumber" name="174" href="#174">174</a>                 <strong class="jxr_keyword">int</strong> headerBlockLength = data.readableBytes();
<a class="jxr_linenumber" name="175" href="#175">175</a>                 <strong class="jxr_keyword">int</strong> length;
<a class="jxr_linenumber" name="176" href="#176">176</a>                 <strong class="jxr_keyword">if</strong> (version &lt; 3) {
<a class="jxr_linenumber" name="177" href="#177">177</a>                     length = headerBlockLength == 0 ? 8 : 6 + headerBlockLength;
<a class="jxr_linenumber" name="178" href="#178">178</a>                 } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="179" href="#179">179</a>                     length = 4 + headerBlockLength;
<a class="jxr_linenumber" name="180" href="#180">180</a>                 }
<a class="jxr_linenumber" name="181" href="#181">181</a>                 <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(
<a class="jxr_linenumber" name="182" href="#182">182</a>                         ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + 8);
<a class="jxr_linenumber" name="183" href="#183">183</a>                 frame.writeShort(version | 0x8000);
<a class="jxr_linenumber" name="184" href="#184">184</a>                 frame.writeShort(SPDY_SYN_REPLY_FRAME);
<a class="jxr_linenumber" name="185" href="#185">185</a>                 frame.writeByte(flags);
<a class="jxr_linenumber" name="186" href="#186">186</a>                 frame.writeMedium(length);
<a class="jxr_linenumber" name="187" href="#187">187</a>                 frame.writeInt(spdySynReplyFrame.getStreamId());
<a class="jxr_linenumber" name="188" href="#188">188</a>                 <strong class="jxr_keyword">if</strong> (version &lt; 3) {
<a class="jxr_linenumber" name="189" href="#189">189</a>                     <strong class="jxr_keyword">if</strong> (data.readableBytes() == 0) {
<a class="jxr_linenumber" name="190" href="#190">190</a>                         frame.writeInt(0);
<a class="jxr_linenumber" name="191" href="#191">191</a>                     } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="192" href="#192">192</a>                         frame.writeShort(0);
<a class="jxr_linenumber" name="193" href="#193">193</a>                     }
<a class="jxr_linenumber" name="194" href="#194">194</a>                 }
<a class="jxr_linenumber" name="195" href="#195">195</a>                 <em class="jxr_comment">// Writes of compressed data must occur in order</em>
<a class="jxr_linenumber" name="196" href="#196">196</a>                 <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> buffer = ChannelBuffers.wrappedBuffer(frame, data);
<a class="jxr_linenumber" name="197" href="#197">197</a>                 Channels.write(ctx, e.getFuture(), buffer, e.getRemoteAddress());
<a class="jxr_linenumber" name="198" href="#198">198</a>             }
<a class="jxr_linenumber" name="199" href="#199">199</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="200" href="#200">200</a>         }
<a class="jxr_linenumber" name="201" href="#201">201</a> 
<a class="jxr_linenumber" name="202" href="#202">202</a>         <strong class="jxr_keyword">if</strong> (msg instanceof SpdyRstStreamFrame) {
<a class="jxr_linenumber" name="203" href="#203">203</a> 
<a class="jxr_linenumber" name="204" href="#204">204</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyRstStreamFrame.html">SpdyRstStreamFrame</a> spdyRstStreamFrame = (SpdyRstStreamFrame) msg;
<a class="jxr_linenumber" name="205" href="#205">205</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(
<a class="jxr_linenumber" name="206" href="#206">206</a>                     ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + 8);
<a class="jxr_linenumber" name="207" href="#207">207</a>             frame.writeShort(version | 0x8000);
<a class="jxr_linenumber" name="208" href="#208">208</a>             frame.writeShort(SPDY_RST_STREAM_FRAME);
<a class="jxr_linenumber" name="209" href="#209">209</a>             frame.writeInt(8);
<a class="jxr_linenumber" name="210" href="#210">210</a>             frame.writeInt(spdyRstStreamFrame.getStreamId());
<a class="jxr_linenumber" name="211" href="#211">211</a>             frame.writeInt(spdyRstStreamFrame.getStatus().getCode());
<a class="jxr_linenumber" name="212" href="#212">212</a>             Channels.write(ctx, e.getFuture(), frame, e.getRemoteAddress());
<a class="jxr_linenumber" name="213" href="#213">213</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="214" href="#214">214</a>         }
<a class="jxr_linenumber" name="215" href="#215">215</a> 
<a class="jxr_linenumber" name="216" href="#216">216</a>         <strong class="jxr_keyword">if</strong> (msg instanceof SpdySettingsFrame) {
<a class="jxr_linenumber" name="217" href="#217">217</a> 
<a class="jxr_linenumber" name="218" href="#218">218</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySettingsFrame.html">SpdySettingsFrame</a> spdySettingsFrame = (SpdySettingsFrame) msg;
<a class="jxr_linenumber" name="219" href="#219">219</a>             byte flags = spdySettingsFrame.clearPreviouslyPersistedSettings() ?
<a class="jxr_linenumber" name="220" href="#220">220</a>                 SPDY_SETTINGS_CLEAR : 0;
<a class="jxr_linenumber" name="221" href="#221">221</a>             Set&lt;Integer&gt; IDs = spdySettingsFrame.getIds();
<a class="jxr_linenumber" name="222" href="#222">222</a>             <strong class="jxr_keyword">int</strong> numEntries = IDs.size();
<a class="jxr_linenumber" name="223" href="#223">223</a>             <strong class="jxr_keyword">int</strong> length = 4 + numEntries * 8;
<a class="jxr_linenumber" name="224" href="#224">224</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(
<a class="jxr_linenumber" name="225" href="#225">225</a>                     ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + length);
<a class="jxr_linenumber" name="226" href="#226">226</a>             frame.writeShort(version | 0x8000);
<a class="jxr_linenumber" name="227" href="#227">227</a>             frame.writeShort(SPDY_SETTINGS_FRAME);
<a class="jxr_linenumber" name="228" href="#228">228</a>             frame.writeByte(flags);
<a class="jxr_linenumber" name="229" href="#229">229</a>             frame.writeMedium(length);
<a class="jxr_linenumber" name="230" href="#230">230</a>             frame.writeInt(numEntries);
<a class="jxr_linenumber" name="231" href="#231">231</a>             <strong class="jxr_keyword">for</strong> (Integer ID: IDs) {
<a class="jxr_linenumber" name="232" href="#232">232</a>                 <strong class="jxr_keyword">int</strong> id = ID.intValue();
<a class="jxr_linenumber" name="233" href="#233">233</a>                 byte ID_flags = 0;
<a class="jxr_linenumber" name="234" href="#234">234</a>                 <strong class="jxr_keyword">if</strong> (spdySettingsFrame.isPersistValue(id)) {
<a class="jxr_linenumber" name="235" href="#235">235</a>                     ID_flags |= SPDY_SETTINGS_PERSIST_VALUE;
<a class="jxr_linenumber" name="236" href="#236">236</a>                 }
<a class="jxr_linenumber" name="237" href="#237">237</a>                 <strong class="jxr_keyword">if</strong> (spdySettingsFrame.isPersisted(id)) {
<a class="jxr_linenumber" name="238" href="#238">238</a>                     ID_flags |= SPDY_SETTINGS_PERSISTED;
<a class="jxr_linenumber" name="239" href="#239">239</a>                 }
<a class="jxr_linenumber" name="240" href="#240">240</a>                 <strong class="jxr_keyword">if</strong> (version &lt; 3) {
<a class="jxr_linenumber" name="241" href="#241">241</a>                     <em class="jxr_comment">// Chromium Issue 79156</em>
<a class="jxr_linenumber" name="242" href="#242">242</a>                     <em class="jxr_comment">// SPDY setting ids are not written in network byte order</em>
<a class="jxr_linenumber" name="243" href="#243">243</a>                     <em class="jxr_comment">// Write id assuming the architecture is little endian</em>
<a class="jxr_linenumber" name="244" href="#244">244</a>                     frame.writeByte(id &amp; 0xFF);
<a class="jxr_linenumber" name="245" href="#245">245</a>                     frame.writeByte(id &gt;&gt;  8 &amp; 0xFF);
<a class="jxr_linenumber" name="246" href="#246">246</a>                     frame.writeByte(id &gt;&gt; 16 &amp; 0xFF);
<a class="jxr_linenumber" name="247" href="#247">247</a>                     frame.writeByte(ID_flags);
<a class="jxr_linenumber" name="248" href="#248">248</a>                 } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="249" href="#249">249</a>                     frame.writeByte(ID_flags);
<a class="jxr_linenumber" name="250" href="#250">250</a>                     frame.writeMedium(id);
<a class="jxr_linenumber" name="251" href="#251">251</a>                 }
<a class="jxr_linenumber" name="252" href="#252">252</a>                 frame.writeInt(spdySettingsFrame.getValue(id));
<a class="jxr_linenumber" name="253" href="#253">253</a>             }
<a class="jxr_linenumber" name="254" href="#254">254</a>             Channels.write(ctx, e.getFuture(), frame, e.getRemoteAddress());
<a class="jxr_linenumber" name="255" href="#255">255</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="256" href="#256">256</a>         }
<a class="jxr_linenumber" name="257" href="#257">257</a> 
<a class="jxr_linenumber" name="258" href="#258">258</a>         <strong class="jxr_keyword">if</strong> (msg instanceof SpdyNoOpFrame) {
<a class="jxr_linenumber" name="259" href="#259">259</a> 
<a class="jxr_linenumber" name="260" href="#260">260</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(
<a class="jxr_linenumber" name="261" href="#261">261</a>                     ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE);
<a class="jxr_linenumber" name="262" href="#262">262</a>             frame.writeShort(version | 0x8000);
<a class="jxr_linenumber" name="263" href="#263">263</a>             frame.writeShort(SPDY_NOOP_FRAME);
<a class="jxr_linenumber" name="264" href="#264">264</a>             frame.writeInt(0);
<a class="jxr_linenumber" name="265" href="#265">265</a>             Channels.write(ctx, e.getFuture(), frame, e.getRemoteAddress());
<a class="jxr_linenumber" name="266" href="#266">266</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="267" href="#267">267</a>         }
<a class="jxr_linenumber" name="268" href="#268">268</a> 
<a class="jxr_linenumber" name="269" href="#269">269</a>         <strong class="jxr_keyword">if</strong> (msg instanceof SpdyPingFrame) {
<a class="jxr_linenumber" name="270" href="#270">270</a> 
<a class="jxr_linenumber" name="271" href="#271">271</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyPingFrame.html">SpdyPingFrame</a> spdyPingFrame = (SpdyPingFrame) msg;
<a class="jxr_linenumber" name="272" href="#272">272</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(
<a class="jxr_linenumber" name="273" href="#273">273</a>                     ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + 4);
<a class="jxr_linenumber" name="274" href="#274">274</a>             frame.writeShort(version | 0x8000);
<a class="jxr_linenumber" name="275" href="#275">275</a>             frame.writeShort(SPDY_PING_FRAME);
<a class="jxr_linenumber" name="276" href="#276">276</a>             frame.writeInt(4);
<a class="jxr_linenumber" name="277" href="#277">277</a>             frame.writeInt(spdyPingFrame.getId());
<a class="jxr_linenumber" name="278" href="#278">278</a>             Channels.write(ctx, e.getFuture(), frame, e.getRemoteAddress());
<a class="jxr_linenumber" name="279" href="#279">279</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="280" href="#280">280</a>         }
<a class="jxr_linenumber" name="281" href="#281">281</a> 
<a class="jxr_linenumber" name="282" href="#282">282</a>         <strong class="jxr_keyword">if</strong> (msg instanceof SpdyGoAwayFrame) {
<a class="jxr_linenumber" name="283" href="#283">283</a> 
<a class="jxr_linenumber" name="284" href="#284">284</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyGoAwayFrame.html">SpdyGoAwayFrame</a> spdyGoAwayFrame = (SpdyGoAwayFrame) msg;
<a class="jxr_linenumber" name="285" href="#285">285</a>             <strong class="jxr_keyword">int</strong> length = version &lt; 3 ? 4 : 8;
<a class="jxr_linenumber" name="286" href="#286">286</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(
<a class="jxr_linenumber" name="287" href="#287">287</a>                     ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + length);
<a class="jxr_linenumber" name="288" href="#288">288</a>             frame.writeShort(version | 0x8000);
<a class="jxr_linenumber" name="289" href="#289">289</a>             frame.writeShort(SPDY_GOAWAY_FRAME);
<a class="jxr_linenumber" name="290" href="#290">290</a>             frame.writeInt(length);
<a class="jxr_linenumber" name="291" href="#291">291</a>             frame.writeInt(spdyGoAwayFrame.getLastGoodStreamId());
<a class="jxr_linenumber" name="292" href="#292">292</a>             <strong class="jxr_keyword">if</strong> (version &gt;= 3) {
<a class="jxr_linenumber" name="293" href="#293">293</a>                 frame.writeInt(spdyGoAwayFrame.getStatus().getCode());
<a class="jxr_linenumber" name="294" href="#294">294</a>             }
<a class="jxr_linenumber" name="295" href="#295">295</a>             Channels.write(ctx, e.getFuture(), frame, e.getRemoteAddress());
<a class="jxr_linenumber" name="296" href="#296">296</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="297" href="#297">297</a>         }
<a class="jxr_linenumber" name="298" href="#298">298</a> 
<a class="jxr_linenumber" name="299" href="#299">299</a>         <strong class="jxr_keyword">if</strong> (msg instanceof SpdyHeadersFrame) {
<a class="jxr_linenumber" name="300" href="#300">300</a> 
<a class="jxr_linenumber" name="301" href="#301">301</a>             <strong class="jxr_keyword">synchronized</strong> (headerBlockCompressor) {
<a class="jxr_linenumber" name="302" href="#302">302</a>                 <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyHeadersFrame.html">SpdyHeadersFrame</a> spdyHeadersFrame = (SpdyHeadersFrame) msg;
<a class="jxr_linenumber" name="303" href="#303">303</a>                 <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> data = compressHeaderBlock(
<a class="jxr_linenumber" name="304" href="#304">304</a>                         encodeHeaderBlock(version, spdyHeadersFrame));
<a class="jxr_linenumber" name="305" href="#305">305</a>                 byte flags = spdyHeadersFrame.isLast() ? SPDY_FLAG_FIN : 0;
<a class="jxr_linenumber" name="306" href="#306">306</a>                 <strong class="jxr_keyword">int</strong> headerBlockLength = data.readableBytes();
<a class="jxr_linenumber" name="307" href="#307">307</a>                 <strong class="jxr_keyword">int</strong> length;
<a class="jxr_linenumber" name="308" href="#308">308</a>                 <strong class="jxr_keyword">if</strong> (version &lt; 3) {
<a class="jxr_linenumber" name="309" href="#309">309</a>                     length = headerBlockLength == 0 ? 4 : 6 + headerBlockLength;
<a class="jxr_linenumber" name="310" href="#310">310</a>                 } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="311" href="#311">311</a>                     length = 4 + headerBlockLength;
<a class="jxr_linenumber" name="312" href="#312">312</a>                 }
<a class="jxr_linenumber" name="313" href="#313">313</a>                 <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(
<a class="jxr_linenumber" name="314" href="#314">314</a>                         ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + length);
<a class="jxr_linenumber" name="315" href="#315">315</a>                 frame.writeShort(version | 0x8000);
<a class="jxr_linenumber" name="316" href="#316">316</a>                 frame.writeShort(SPDY_HEADERS_FRAME);
<a class="jxr_linenumber" name="317" href="#317">317</a>                 frame.writeByte(flags);
<a class="jxr_linenumber" name="318" href="#318">318</a>                 frame.writeMedium(length);
<a class="jxr_linenumber" name="319" href="#319">319</a>                 frame.writeInt(spdyHeadersFrame.getStreamId());
<a class="jxr_linenumber" name="320" href="#320">320</a>                 <strong class="jxr_keyword">if</strong> (version &lt; 3 &amp;&amp; data.readableBytes() != 0) {
<a class="jxr_linenumber" name="321" href="#321">321</a>                     frame.writeShort(0);
<a class="jxr_linenumber" name="322" href="#322">322</a>                 }
<a class="jxr_linenumber" name="323" href="#323">323</a>                 <em class="jxr_comment">// Writes of compressed data must occur in order</em>
<a class="jxr_linenumber" name="324" href="#324">324</a>                 <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> buffer = ChannelBuffers.wrappedBuffer(frame, data);
<a class="jxr_linenumber" name="325" href="#325">325</a>                 Channels.write(ctx, e.getFuture(), buffer, e.getRemoteAddress());
<a class="jxr_linenumber" name="326" href="#326">326</a>             }
<a class="jxr_linenumber" name="327" href="#327">327</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="328" href="#328">328</a>         }
<a class="jxr_linenumber" name="329" href="#329">329</a> 
<a class="jxr_linenumber" name="330" href="#330">330</a>         <strong class="jxr_keyword">if</strong> (msg instanceof SpdyWindowUpdateFrame) {
<a class="jxr_linenumber" name="331" href="#331">331</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyWindowUpdateFrame.html">SpdyWindowUpdateFrame</a> spdyWindowUpdateFrame = (SpdyWindowUpdateFrame) msg;
<a class="jxr_linenumber" name="332" href="#332">332</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(
<a class="jxr_linenumber" name="333" href="#333">333</a>                     ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + 8);
<a class="jxr_linenumber" name="334" href="#334">334</a>             frame.writeShort(version | 0x8000);
<a class="jxr_linenumber" name="335" href="#335">335</a>             frame.writeShort(SPDY_WINDOW_UPDATE_FRAME);
<a class="jxr_linenumber" name="336" href="#336">336</a>             frame.writeInt(8);
<a class="jxr_linenumber" name="337" href="#337">337</a>             frame.writeInt(spdyWindowUpdateFrame.getStreamId());
<a class="jxr_linenumber" name="338" href="#338">338</a>             frame.writeInt(spdyWindowUpdateFrame.getDeltaWindowSize());
<a class="jxr_linenumber" name="339" href="#339">339</a>             Channels.write(ctx, e.getFuture(), frame, e.getRemoteAddress());
<a class="jxr_linenumber" name="340" href="#340">340</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="341" href="#341">341</a>         }
<a class="jxr_linenumber" name="342" href="#342">342</a> 
<a class="jxr_linenumber" name="343" href="#343">343</a>         <em class="jxr_comment">// Unknown message type</em>
<a class="jxr_linenumber" name="344" href="#344">344</a>         ctx.sendDownstream(evt);
<a class="jxr_linenumber" name="345" href="#345">345</a>     }
<a class="jxr_linenumber" name="346" href="#346">346</a> 
<a class="jxr_linenumber" name="347" href="#347">347</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> writeLengthField(<strong class="jxr_keyword">int</strong> version, <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> buffer, <strong class="jxr_keyword">int</strong> length) {
<a class="jxr_linenumber" name="348" href="#348">348</a>         <strong class="jxr_keyword">if</strong> (version &lt; 3) {
<a class="jxr_linenumber" name="349" href="#349">349</a>             buffer.writeShort(length);
<a class="jxr_linenumber" name="350" href="#350">350</a>         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="351" href="#351">351</a>             buffer.writeInt(length);
<a class="jxr_linenumber" name="352" href="#352">352</a>         }
<a class="jxr_linenumber" name="353" href="#353">353</a>     }
<a class="jxr_linenumber" name="354" href="#354">354</a> 
<a class="jxr_linenumber" name="355" href="#355">355</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> setLengthField(<strong class="jxr_keyword">int</strong> version, <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> buffer, <strong class="jxr_keyword">int</strong> writerIndex, <strong class="jxr_keyword">int</strong> length) {
<a class="jxr_linenumber" name="356" href="#356">356</a>         <strong class="jxr_keyword">if</strong> (version &lt; 3) {
<a class="jxr_linenumber" name="357" href="#357">357</a>             buffer.setShort(writerIndex, length);
<a class="jxr_linenumber" name="358" href="#358">358</a>         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="359" href="#359">359</a>             buffer.setInt(writerIndex, length);
<a class="jxr_linenumber" name="360" href="#360">360</a>         }
<a class="jxr_linenumber" name="361" href="#361">361</a>     }
<a class="jxr_linenumber" name="362" href="#362">362</a> 
<a class="jxr_linenumber" name="363" href="#363">363</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encodeHeaderBlock(<strong class="jxr_keyword">int</strong> version, <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyHeaderBlock.html">SpdyHeaderBlock</a> headerFrame)
<a class="jxr_linenumber" name="364" href="#364">364</a>             <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="365" href="#365">365</a>         Set&lt;String&gt; names = headerFrame.getHeaderNames();
<a class="jxr_linenumber" name="366" href="#366">366</a>         <strong class="jxr_keyword">int</strong> numHeaders = names.size();
<a class="jxr_linenumber" name="367" href="#367">367</a>         <strong class="jxr_keyword">if</strong> (numHeaders == 0) {
<a class="jxr_linenumber" name="368" href="#368">368</a>             <strong class="jxr_keyword">return</strong> ChannelBuffers.EMPTY_BUFFER;
<a class="jxr_linenumber" name="369" href="#369">369</a>         }
<a class="jxr_linenumber" name="370" href="#370">370</a>         <strong class="jxr_keyword">if</strong> (numHeaders &gt; SPDY_MAX_NV_LENGTH) {
<a class="jxr_linenumber" name="371" href="#371">371</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a class="jxr_linenumber" name="372" href="#372">372</a>                     <span class="jxr_string">"header block contains too many headers"</span>);
<a class="jxr_linenumber" name="373" href="#373">373</a>         }
<a class="jxr_linenumber" name="374" href="#374">374</a>         <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> headerBlock = ChannelBuffers.dynamicBuffer(
<a class="jxr_linenumber" name="375" href="#375">375</a>                 ByteOrder.BIG_ENDIAN, 256);
<a class="jxr_linenumber" name="376" href="#376">376</a>         writeLengthField(version, headerBlock, numHeaders);
<a class="jxr_linenumber" name="377" href="#377">377</a>         <strong class="jxr_keyword">for</strong> (String name: names) {
<a class="jxr_linenumber" name="378" href="#378">378</a>             byte[] nameBytes = name.getBytes(<span class="jxr_string">"UTF-8"</span>);
<a class="jxr_linenumber" name="379" href="#379">379</a>             writeLengthField(version, headerBlock, nameBytes.length);
<a class="jxr_linenumber" name="380" href="#380">380</a>             headerBlock.writeBytes(nameBytes);
<a class="jxr_linenumber" name="381" href="#381">381</a>             <strong class="jxr_keyword">int</strong> savedIndex = headerBlock.writerIndex();
<a class="jxr_linenumber" name="382" href="#382">382</a>             <strong class="jxr_keyword">int</strong> valueLength = 0;
<a class="jxr_linenumber" name="383" href="#383">383</a>             writeLengthField(version, headerBlock, valueLength);
<a class="jxr_linenumber" name="384" href="#384">384</a>             <strong class="jxr_keyword">for</strong> (String value: headerFrame.getHeaders(name)) {
<a class="jxr_linenumber" name="385" href="#385">385</a>                 byte[] valueBytes = value.getBytes(<span class="jxr_string">"UTF-8"</span>);
<a class="jxr_linenumber" name="386" href="#386">386</a>                 <strong class="jxr_keyword">if</strong> (valueBytes.length &gt; 0) {
<a class="jxr_linenumber" name="387" href="#387">387</a>                     headerBlock.writeBytes(valueBytes);
<a class="jxr_linenumber" name="388" href="#388">388</a>                     headerBlock.writeByte(0);
<a class="jxr_linenumber" name="389" href="#389">389</a>                     valueLength += valueBytes.length + 1;
<a class="jxr_linenumber" name="390" href="#390">390</a>                 }
<a class="jxr_linenumber" name="391" href="#391">391</a>             }
<a class="jxr_linenumber" name="392" href="#392">392</a>             <strong class="jxr_keyword">if</strong> (valueLength == 0) {
<a class="jxr_linenumber" name="393" href="#393">393</a>                 <strong class="jxr_keyword">if</strong> (version &lt; 3) {
<a class="jxr_linenumber" name="394" href="#394">394</a>                     <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a class="jxr_linenumber" name="395" href="#395">395</a>                             <span class="jxr_string">"header value cannot be empty: "</span> + name);
<a class="jxr_linenumber" name="396" href="#396">396</a>                 }
<a class="jxr_linenumber" name="397" href="#397">397</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="398" href="#398">398</a>                 valueLength --;
<a class="jxr_linenumber" name="399" href="#399">399</a>             }
<a class="jxr_linenumber" name="400" href="#400">400</a>             <strong class="jxr_keyword">if</strong> (valueLength &gt; SPDY_MAX_NV_LENGTH) {
<a class="jxr_linenumber" name="401" href="#401">401</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a class="jxr_linenumber" name="402" href="#402">402</a>                         <span class="jxr_string">"header exceeds allowable length: "</span> + name);
<a class="jxr_linenumber" name="403" href="#403">403</a>             }
<a class="jxr_linenumber" name="404" href="#404">404</a>             <strong class="jxr_keyword">if</strong> (valueLength &gt; 0) {
<a class="jxr_linenumber" name="405" href="#405">405</a>                 setLengthField(version, headerBlock, savedIndex, valueLength);
<a class="jxr_linenumber" name="406" href="#406">406</a>                 headerBlock.writerIndex(headerBlock.writerIndex() - 1);
<a class="jxr_linenumber" name="407" href="#407">407</a>             }
<a class="jxr_linenumber" name="408" href="#408">408</a>         }
<a class="jxr_linenumber" name="409" href="#409">409</a>         <strong class="jxr_keyword">return</strong> headerBlock;
<a class="jxr_linenumber" name="410" href="#410">410</a>     }
<a class="jxr_linenumber" name="411" href="#411">411</a> 
<a class="jxr_linenumber" name="412" href="#412">412</a>     <em class="jxr_comment">// always called while synchronized on headerBlockCompressor</em>
<a class="jxr_linenumber" name="413" href="#413">413</a>     <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> compressHeaderBlock(<a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> uncompressed)
<a class="jxr_linenumber" name="414" href="#414">414</a>             <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="415" href="#415">415</a>         <strong class="jxr_keyword">if</strong> (uncompressed.readableBytes() == 0) {
<a class="jxr_linenumber" name="416" href="#416">416</a>             <strong class="jxr_keyword">return</strong> ChannelBuffers.EMPTY_BUFFER;
<a class="jxr_linenumber" name="417" href="#417">417</a>         }
<a class="jxr_linenumber" name="418" href="#418">418</a>         <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> compressed = ChannelBuffers.dynamicBuffer();
<a class="jxr_linenumber" name="419" href="#419">419</a>         <strong class="jxr_keyword">if</strong> (!finished) {
<a class="jxr_linenumber" name="420" href="#420">420</a>             headerBlockCompressor.setInput(uncompressed);
<a class="jxr_linenumber" name="421" href="#421">421</a>             headerBlockCompressor.encode(compressed);
<a class="jxr_linenumber" name="422" href="#422">422</a>         }
<a class="jxr_linenumber" name="423" href="#423">423</a>         <strong class="jxr_keyword">return</strong> compressed;
<a class="jxr_linenumber" name="424" href="#424">424</a>     }
<a class="jxr_linenumber" name="425" href="#425">425</a> }
</pre>
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